22356121 has 2 divisors, whose sum is σ = 22356122. Its totient is φ = 22356120.

The previous prime is 22356119. The next prime is 22356143. The reversal of 22356121 is 12165322.

It is an a-pointer prime, because the next prime (22356143) can be obtained adding 22356121 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14930496 + 7425625 = 3864^2 + 2725^2 .

It is a cyclic number.

It is not a de Polignac number, because 22356121 - 2¹ = 22356119 is a prime.

It is a super-2 number, since 2×22356121² = 999592292333282, which contains 22 as substring.

Together with 22356119, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 22356092 and 22356101.

It is not a weakly prime, because it can be changed into another prime (22356101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11178060 + 11178061.

It is an arithmetic number, because the mean of its divisors is an integer number (11178061).

Almost surely, 2^22356121 is an apocalyptic number.

It is an amenable number.

22356121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22356121 is an equidigital number, since it uses as much as digits as its factorization.

22356121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 22.

The square root of 22356121 is about 4728.2259886769. The cubic root of 22356121 is about 281.7077644283.

The spelling of 22356121 in words is "twenty-two million, three hundred fifty-six thousand, one hundred twenty-one".